Allison Wang created SPARK-44734:
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Summary: Add documentation for type casting rules in Python
UDFs/UDTFs
Key: SPARK-44734
URL: https://issues.apache.org/jira/browse/SPARK-44734
Project: Spark
Issue Type: Sub-task
Components: PySpark
Affects Versions: 4.0.0
Reporter: Allison Wang
In addition to type mappings between Spark data types and Python data types, we
should add the type casting rules for regular and arrow-optimized Python
UDFs/UDTFs.
We currently have this table in code:
* Arrow:
[https://github.com/apache/spark/blob/master/python/pyspark/sql/pandas/functions.py#L311-L329]
* Python UDF:
[https://github.com/apache/spark/blob/master/python/pyspark/sql/udf.py#L101-L116]
We should add a proper documentation page for the type casting rules.
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